feat: 初始化CSS &输入框

src/assets/css/style.css

@@ -1,6 +1,14 @@
-* {
-  padding: 0;
+body,
+html,
+div,
+ul,
+li,
+h1,
+h2,
+h3,
+p {
   margin: 0;
+  padding: 0;
 }
 html,
 body,
@@ -17,3 +25,28 @@ body,
     transform: rotate(360deg);
   }
 }
+.flex {
+  display: flex;
+}
+.flex-col {
+  flex-direction: column;
+}
+.flex-1 {
+  flex: 1;
+}
+.flex-center {
+  align-items: center;
+  justify-content: center;
+}
+.flex-between {
+  justify-content: space-between;
+}
+.align-center {
+  align-items: center;
+}
+.relative {
+  position: relative;
+}
+.absolute {
+  position: absolute;
+}